Category: O

Deafness caused by working in places where noise levels are quite high. Persons working in such an environment should wear protective devices.  

A cyst associated with the teeth, such as dentigerous or radicular cyst.  

A form of focal dystonia in which agonist and antagonist muscles contract at the same time. This can occur in writers, pianists, typists, and almost any occupation; they are not considered to have an emotional basis.  

One of the small gyri on the orbital surface of the frontal lobe.  

The normal contact between teeth when the maxilla and mandible are brought together in habitual or centric occlusion.  

Constipation due to a mechanical obstruction of the intestines.  

The distance between the sacral promontory and a point slightly below the upper inner margin of the symphysis pubis; the shortest diameter to which the fetal head must accommodate to descend successfully through the pelvic inlet.  

A cone of light in the eye with the point on the retina.  

The learning of a particular action or type of behavior followed by a reward. This technique was publicized by the Harvard psychologist B. F. Skinner, who trained animals to activate (by pecking, in the case of a pigeon, or pressing a bar, in the case of a rat) an apparatus that released a pellet of…

Cirrhosis resulting from obstruction of the common duct by a stone or tumor.